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Growth & Retention

Turn Out-of-Stock Moments Into Future Sales

OpenAgent adds customers to product waitlists, answers restock questions, and sends personalised back-in-stock notifications that convert interest into completed purchases.

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An out-of-stock product is a missed sale today, but it doesn't have to be a missed sale permanently. OpenAgent captures customer interest the moment they discover a product is unavailable — adding them to a waitlist, answering their restock questions honestly, and sending a personalised notification the moment the product is back — before they've found it elsewhere.

The problem

Most ecommerce stores handle out-of-stock situations poorly: a static 'notify me' email form that customers fill out and forget about, followed by a generic mass notification email that arrives too late or gets lost in the inbox. Customers who wanted a product and didn't get it have usually moved on by the time a restock email arrives — bought it from a competitor, found a substitute, or simply lost the impulse.

  • Generic back-in-stock email blasts achieve low conversion because the notification is slow, impersonal, and arrives after competitors have already won the customer
  • Customers who ask about restock timelines get vague answers or no response, eroding trust
  • Out-of-stock situations represent captured demand that most brands fail to convert into future revenue
  • Manual waitlist management across multiple products is time-consuming and error-prone

How OpenAgent handles it

Step 1

Waitlist Enrollment in Conversation

When a customer finds a product out of stock and asks about availability, OpenAgent adds them to the waitlist in real time within the chat — no redirect to a form, no friction.

Step 2

Honest Restock Timeline Answers

If you have a restock date or estimated timeline, OpenAgent shares it. If you don't, OpenAgent is transparent about the uncertainty while making the waitlist enrollment feel worthwhile.

Step 3

Alternative Product Suggestion

While the customer waits, OpenAgent can suggest the closest available alternative — a similar style, a different colorway in stock, or a substitute product — capturing the sale today rather than banking on a future restock.

Step 4

Restock Trigger Notification

When Shopify inventory for a waitlisted SKU is updated above zero, OpenAgent sends personalised restock notifications to the waitlist — via chat, SMS, or email — referencing the specific product they asked about.

Step 5

Priority Access for Long-Waiting Customers

For high-demand restocks, OpenAgent can communicate a limited early-access window to customers who have been on the waitlist longest, rewarding patience and creating urgency.

See it in action

The Merino Crew in Navy is sold out — do you know when it'll be back?
You have great taste — the Merino Crew in Navy is one of our most popular items! We're expecting a restock in approximately 3 weeks. I'll add you to the waitlist right now so you're among the first to know the moment it's available — and we typically notify waitlist customers 24 hours before the public restock so you have the best chance of getting your size. In the meantime, the same style in Charcoal and Forest Green are both in stock in all sizes if either of those works for you.

Why it matters

Captured Demand Converted to Revenue

Every waitlist enrollment is future revenue — customers who have explicitly stated they want a product and asked to be notified convert at extremely high rates when the product returns.

No Lost Customers to Out-of-Stock Moments

An out-of-stock customer who leaves without a waitlist enrollment is likely gone. One who enrolls in a waitlist and receives a fast, personalised notification has a high probability of returning.

Reduced Customer Frustration

Honest restock communication and alternative product suggestions turn a frustrating 'sold out' moment into a helpful, trust-building interaction.

Automated Restock Notification Delivery

No manual waitlist management — OpenAgent monitors inventory and sends notifications automatically when stock is restored.

Merchandising Intelligence

Waitlist enrollment volume by SKU gives you demand signal data — products with large waitlists signal where to prioritise restock investment.

38%
Waitlist-to-purchase conversion rate for personalised restock notifications
6x
Higher restock conversion vs. generic mass back-in-stock email
24 hr
Average time from restock trigger to waitlist notification sent

Frequently Asked Questions

OpenAgent monitors Shopify inventory webhooks for inventory level changes. When a waitlisted SKU returns to a positive inventory quantity, the notification flow is triggered automatically.

Yes. You can configure a priority window — for example, waitlisted customers receive notification 24 hours before the general announcement — creating a loyalty-building VIP moment out of every restock.

OpenAgent notifies customers in waitlist order, and messages can include stock urgency context — 'limited units available' — to prompt fast action. Once the partial stock is sold out, remaining waitlist customers are held for the next restock cycle.

Yes. Waitlist enrollment is at the variant level, so a customer waiting for the Navy size M gets notified specifically when that variant returns — not when any colorway or size of the product restocks.

Yes. When adding a customer to a waitlist, OpenAgent can simultaneously recommend in-stock alternatives that serve the same need — giving the customer an immediate path to purchase rather than just waiting.

If you know your restock date, OpenAgent communicates it and schedules the notification to go out on that date. If the date is uncertain, OpenAgent gives an estimated window and sends the notification as soon as the inventory webhook fires.

Related use cases

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AI-Powered Product Recommendations

OpenAgent recommends the right products at the right time — automatically, in every support chat.

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Let OpenAgent handle it for you

Join the ecommerce teams resolving more tickets, answering 24/7, and turning support into a revenue channel with OpenAgent.

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